Device for ventilating mines



(No Model.) I

W. H. HOADLEY.

DEVICE FOR VENTILATING MINES, GBLLARS, &c. No. 415,269. Patented Nov. 19, 1889.

wnessiss 1 mvsmoa 2 T'E BYflM/JW ATTORNEYS UNITED STATES PATENT OFFICE.

\VIIILIAM II. IIOADLEY, OF O'IIENANGO FORKS, NEIV YORK.

DEVICE FOR VENTILATING MINES, CELLARS, 84o.

SPECIFICATION forming part of Letters Patent No. 415,269, dated November 19, 1889.

Application filed May 18, 1887. Serial No. 238,579. (No model.)

tion of noxious gases; and the invention has more particular reference to the apparatus shown in my patent, No. 193,655, dated July 31, 1877, my present invention consisting in a specific improvement in the construction and combination of parts, which renders the said apparatus more effective in its operation, all as hereinafter more fully described, and set forth in the claim.

In the annexed drawings, Figure 1 is a vertical longitudinal section of an apparatus embodying my improvements; and Fig. 2 is a horizontal transverse section on line 00 01:, Fig. 1.

Similar letters of reference indicate corresponding parts.

A represents a stove or furnace, which may be of any suitable form and construction, provided with a grate a and subjacent ashpit B, which is to have solid walls, With a closely-fitting door D, through which to remove the ash-pan P. The bottom of the ashpit is also air-tight, with the exception of a port 0 in the center thereof for the reception of the discharge end of the ventiduct I, which is extended to and terminates with an open receiving end at the cellar or mine 0 or other locality to be ventilated.

By excluding from the ash-pit B the air from the compartment in which the stove or furnace A is located a suction is produced through the ventiduct I from the receiving end thereof to the ash-pit, and this suction is materially increased when a fire is burning on the grate a.

The ash-pan P is somewhat smaller in diameter than the ash-pit, and is supported at a proper elevation above the discharge end of the ventiduct I to allow the gases issuing from the latter to circulate toward the sides of the ash-pit and ascend to and through the grate and through the overlying burning fuel, by which latter the gases are consumed. Over the discharge end of the ventiduct I place a removable valve or damper n, which may be closed to augment the draft through the grate when first starting the fire, or to prevent the gases from escaping from the ventiduct through the ash-pit door While opened to remove the ash-pan.

The admission of the gases under the center of the ash-pan causes said gases to become thoroughly distributed around the under side of the grate, and in their ascent through the fire the gases are diifused and caused to unite more effectually with the gases generated by the combustion of the fuel, and are thus effectually consumed.

Having described my invention, What I claim as new, and desire to secure by Letters Patent, is

The combination, with the stove orfurnace and its ash-pit, of the ventiduct I, having its discharge end in the center of the bottom of the ash-pit, and the ash-pan P, of smaller diameter than the ash-pit and supported above the discharge end of the ventiduct, substantially in the manner and for the purpose shown and set forth.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM H. IIOADLEY.

Witnesses:

ED ALLEY, SAMUEL KEATOR. 

